package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
       // password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /*
     * 新增员工
     * */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //属性拷贝  a拷贝到b
        BeanUtils.copyProperties(employeeDTO,employee); //在dto中没有status、password、createTime、updateTime、createUser、updateUser
        //设置状态  枚举：StatusConstant 启用1 禁用0
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码md5加密 枚举：PasswordConstant
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置创建时间和修改时间
       /* employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //记录人id和修改人id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //插入操作
        employeeMapper.insert(employee);
    }

    /*
     * 分页查询
     * */
    @Override
    public PageResult PageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询 select * from employee limit 页数 总条数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page =  employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal(); //获取总条数
        List<Employee> records = page.getResult(); //返回员工信息
        return new PageResult(total,records);
    }

    /*启用禁用员工账号*/
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);
    }

    /*根据id查询员工信息*/
    @Override
    public Employee selectById(Long id) {
       Employee employee =  employeeMapper.selectById(id);
       employee.setPassword("");
       return employee;
    }

    //修改
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
       /* employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }
}
